Azure DevOps now supports HTML in PR descriptions (#8628)

While researching #6287 (comment),
I noticed that https://developercommunity.visualstudio.com/content/problem/608769/add-support-for-in-markdown.html
eventually leads to https://developercommunity.visualstudio.com/t/add-support-for-the-html-tag-in-markdown/609415#T-N1190213
which says that Azure ADO now supports the `<details>` tag in Markdown.

Furthermore, I suspect that ADO now fully supports HTML in PR
descriptions but it's not documented either way in https://learn.microsoft.com/en-us/rest/api/azure/devops/git/pull-requests/create?view=azure-devops-rest-7.0&tabs=HTTP#request-body.

So opening this PR as the simple solution. If ADO doesn't support HTML
but does support the `<details>` tag, then we'll unfortunately need a
more complex solution of refactoring things... but I hope not.

Fix #6453

common/lib/dependabot/pull_request_creator/message_builder/metadata_presenter.rb

@@ -148,7 +148,6 @@ def maintainer_changes_cascade
         end
 
         def build_details_tag(summary:, body:)
-          # Azure DevOps does not support <details> tag (https://developercommunity.visualstudio.com/content/problem/608769/add-support-for-in-markdown.html)
           # Bitbucket does not support <details> tag (https://jira.atlassian.com/browse/BCLOUD-20231)
           # CodeCommit does not support the <details> tag (no url available)
           if source_provider_supports_html?
@@ -244,7 +243,7 @@ def break_tag
         end
 
         def source_provider_supports_html?
-          !%w(azure bitbucket codecommit).include?(source.provider)
+          !%w(bitbucket codecommit).include?(source.provider)
         end
 
         def sanitize_links_and_mentions(text, unsafe: false)